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 <p>Os padr&otilde;es cron s&atilde;o origin&aacute;rios na ferramenta "cron"
(de "cronol&oacute;gico") 
 de sistemas baseados no UNIX. Apesar de que estes padr&otilde;es possam parecer
arcanos, 
 representam maneiras bastante simples, poderosas e elegantes de definir grandes
quantidades 
 de eventos baseados no tempo.</p>
 
<!--<p>Cron patterns originated from the unix-based "cron" (from-->
<!--"chronological") utility. Although the patterns may at first appear-->
<!--arcane, they are in fact simple, powerful, and elegant ways of defining-->
<!--a large set of time-based events.</p>-->

<p>Os padr&otilde;es cron no Scada-LTS s&atilde;o implementados pelo Quartz, uma
biblioteca de agendamento
baseada em Java. Maiores informa&ccedil;&otilde;es sobre a
defini&ccedil;&atilde;o de padr&otilde;es cron, pode ser acessada em: </p>
<p><a href="http://www.quartz-scheduler.org/documentation/quartz-2.3.0/tutorials/crontrigger.html" target="_blank">CronTriggers Tutorial</a></p>
<p><a href="https://www.freeformatter.com/cron-expression-generator-quartz.html" target="_blank">CronTriggers Generator</a></p>
</p>

<!--<p>Cron patterns in Scada-LTS are implemented by Quartz, a Java-based-->
<!--scheduling library. More information on the definition of cron patterns-->
<!--can be found here: <a-->
<!--
href="http://www.opensymphony.com/quartz/wikidocs/CronTriggers%20Tutorial.html"-
->
<!--	target="_blank">CronTriggers Tutorial</a>.</p>-->

<p>Example configuration: <b>1 */15 * * * ?</b> = At second :01, every 15 minutes starting at minute :00, of every hour </p>